The main uses of 1-amino-3-naphthol are involved in many fields. In the dye industry, it is a key intermediate. Due to its special chemical structure, it can undergo a series of chemical reactions to obtain dyes with bright color and good fastness. It can be used for dyeing various fiber fabrics such as cotton, hemp, silk, and wool, making the fabric show rich and brilliant colors to meet the diverse needs of the world for fabric color.
In the field of medicine, 1-amino-3-naphthol also plays an important role. It is often used as a raw material for the synthesis of various drugs, or participates in the construction of drug molecules. Due to its certain biological activity, it is helpful for the treatment or prevention of certain diseases, or provides a basic chemical structural unit for the development of new drugs, helping medical workers to create drugs with better curative effect and less side effects.
In chemical analysis, 1-amino-3-naphthol can be used as an analytical reagent. Because it can have a color reaction with specific metal ions, and the reaction is sensitive and selective, it is often used for qualitative and quantitative analysis of metal ions. By observing the color change after the reaction with metal ions, the content of specific metal ions in samples can be accurately determined, and it is widely used in environmental monitoring, ore analysis and other fields.
In addition, in the field of organic synthesis, 1-amino-3-naphthol is also a commonly used building block for organic synthesis. Chemists can combine it with other organic compounds through ingenious chemical reactions to construct more complex organic molecular structures, expand the scope of organic synthesis, and provide powerful tools for the research and development of new materials and new compounds.

The physical properties of 1-amino-3-naphthol are as follows:
The outer surface is usually crystalline, and the color is either white or white. Under normal conditions, this substance is determined. In terms of melting, it usually depends on a specific degree of solubility, and having a value is one of its important physical properties, but it is different from the degree of solubility or microwave.
In terms of solubility, 1-amino-3-naphthol can be dissolved to a certain extent in some solvents. In water, its solubility is limited, and this property is due to the basic properties of its molecules. The amino group and naphthol group of its molecule make it have certain properties, but they are not highly soluble. Therefore, the solubility in water such as water is not good, and in some of the suitable solubility, it can have a good dispersion and dissolution table.
Furthermore, its density is also an important physical property. The density reflects the amount of the material in the position, and the density of 1-amino-3-naphthol. It can help to provide information in terms of its dosage and mixing ratio in the process of multiplexing or operation.
In addition, this material may have a certain taste, taste or not very strong, but it is also a physical property.
In addition, under external conditions such as light irradiation, its physical properties such as color or crystal form can be changed, or it can be changed slowly. This is due to factors such as photochemical reactions, and it also affects its physical properties under specific circumstances. Therefore, the physical properties of 1-amino-3-naphthol are of great significance for research and application in chemical industry, chemical industry, and other fields.

The chemical properties of 1-amino-3-naphthol are quite stable. Under normal conditions, the compounds formed by the two rarely change spontaneously.
Amino groups have the property of electron conductors, which can enhance the density of molecular electron clouds and change the activity of the atoms connected to them. It can participate in many reactions, such as nucleophilic substitution, because the amino nitrogen atom has an isolated pair of electrons, it can attack electrophilic reagents. However, in the general environment, if there is no specific reagent or condition to excite, the amino group is relatively stable.
In 3-naphthol, the naphthalene ring is a conjugated system with stable properties. The phenolic hydroxyl group is conjugated with the naphthalene ring, which makes the phenolic hydroxyl hydrogen atom more active, and can weakly ionize hydrogen ions, showing weak acidity. However, this kind of acidity is very weak, and the change is not significant in the general acid-base environment. Moreover, the naphthalene ring has a certain stability due to the existence of conjugated large π bonds and the uniform distribution of electron clouds.
When 1-amino and 3-naphthol are connected, the two affect each other. The electron supply effect of amino groups cooperates with the conjugated system of naphthol to stabilize the molecular structure. In common chemical environments, such as ordinary room temperature, normal pressure, no strong oxidants, strong acids and bases, 1-amino-3-naphthol rarely undergoes chemical changes, and the whole shows relatively stable chemical properties. However, under specific reaction conditions, such as high temperature, specific catalysts, and strongly reactive reagents, the active sites in the molecule, such as amino groups and phenolic hydroxyl groups, will participate in the reaction and exhibit diverse chemical activities.

The method of preparing 1-amino-3-bromobenzene has been different throughout the ages. There are three methods, which are detailed as follows:
First, benzene is used as the starting material, and nitrobenzene is obtained by nitrification. Then iron powder and hydrochloric acid are used as the agent to reduce nitrobenzene to aniline. Then a brominating agent, such as liquid bromine and an appropriate amount of catalyst, can be reacted under specific conditions to obtain 1-amino-3-bromobenzene. During this process, the temperature of nitration needs to be precisely controlled to maintain the purity of the product; when reducing, the amount of iron powder and hydrochloric acid also needs to be weighed to make the reaction smooth.
Second, aniline is used as the starting material. Aniline is first acetylated to protect the amino group from over-bromination in subsequent reactions. The commonly used acetylation reagent is acetic anhydride, and the two react to form acetaniline. After bromine is used as a brominating agent, acetaniline is brominated under the action of suitable solvents and catalysts to obtain p-bromoacetaniline. Finally, acid or base is used as a hydrolyzer to hydrolyze p-bromoacetaniline and re-release the amino group to obtain 1-amino-3-bromobenzene. In this path, the conditions of acetylation, bromination and hydrolysis steps, such as temperature, time, reagent concentration, etc., are all related to the yield and purity of the product.
Third, nitrobenzene is used as the initial raw material, first brominated to obtain m-bromonitrobenzene. Then catalytic hydrogenation or chemical reduction method is used to reduce the nitro group of m-bromonitrobenzene to amino group, and then 1-amino-3-bromobenzene is obtained. When catalyzing hydrogenation, it is necessary to select a suitable catalyst, such as palladium carbon, and adjust the reaction pressure and temperature; the principle of chemical addition requires the selection of suitable reducing agents, such as stannous hydride, etc., and pay attention to the control of the reaction conditions.
These three production methods have their own advantages and disadvantages. According to the actual needs, the cost of raw materials, the difficulty of reaction, the purity and yield of the product and other factors should be weighed, and the best should be followed.

1-Amino-3-naphthol needs to pay attention to many key matters during storage and transportation.
First, because it has certain chemical activity, it has strict requirements on packaging materials. Corrosion-resistant packaging should be selected, such as specific plastic materials or containers lined with special coatings, to prevent material leakage due to packaging erosion. If it is packaged in simple ordinary packaging, under transportation vibration or long-term storage, the packaging is vulnerable and the material is spilled, which is not only wasted, but also may pollute the environment and endanger the safety of surrounding personnel.
Second, temperature and humidity have a great impact on it. This substance is suitable for storage in a cool and dry place. If the temperature is too high, it may cause its chemical reaction and cause it to deteriorate; if the humidity is too high, it may make it deliquescent and change its physical and chemical properties. For example, in the humid and hot places in the south, if the storage environment is not well controlled by temperature and humidity, the quality of the material will be difficult to guarantee.
Third, during transportation, it is necessary to avoid mixing with oxidizing substances. 1-Amino-3-naphthol encounters strong oxidizing agents, which are prone to violent reactions, or cause combustion or even explosion. For example, sulfur and strong oxidizing agents are transported together, and they are prone to danger when colliding and rubbing. The same is true for both.
Fourth, handle with care when handling. Due to the form of the substance or a fragile state such as crystals, the package is damaged due to rough handling. At the same time, it may also cause chemical reactions due to friction and impact.
Fifth, the storage place should be kept away from fire and heat sources. 1-Amino-3-naphthol is a flammable or flammable chemical. In case of open flames and hot topics, there is a risk of combustion, which threatens the safety of life and property.
Sixth, the logo must be clear. On the package, its chemical name, dangerous characteristics, emergency treatment methods, etc. should be clearly marked to facilitate staff identification and emergency response, and avoid misoperation.